Add more verbose log message when stack map isn't found.

Also enable the check in release build.

Bug: 206556383
Test: Make the check always fail and observe the log message
Change-Id: Ie077677275aff0a1c55a7751f4506830830cbf68
diff --git a/runtime/stack.cc b/runtime/stack.cc
index 33d3668..a6a5165 100644
--- a/runtime/stack.cc
+++ b/runtime/stack.cc
@@ -129,7 +129,7 @@
           GetCurrentQuickFrame(), cur_quick_frame_pc_, abort_on_failure);
     } else if (cur_oat_quick_method_header_->IsOptimized()) {
       StackMap* stack_map = GetCurrentStackMap();
-      DCHECK(stack_map->IsValid());
+      CHECK(stack_map->IsValid()) << "StackMap not found for " << std::hex << cur_quick_frame_pc_;
       return stack_map->GetDexPc();
     } else {
       DCHECK(cur_oat_quick_method_header_->IsNterpMethodHeader());